Expansion of 1/((1-2*x)*(1-6*x)*(1-7*x)).

Terms

a(0) =1a(1) =15a(2) =157a(3) =1419a(4) =11869a(5) =94731a(6) =733069a(7) =5551323a(8) =41378557a(9) =304766187a(10) =2224062061a(11) =16112628987a(12) =116053574365a(13) =831966057483